Bed and cylinder printing press



Aug. 19, 1930. c. B. COTTRELL. 3D 1,773,095

' BED AND CYLINDER PRINTING PRESS Filed June 5, 1928 4 Sheets-Sheet 1 ATTORN EYS Aug. 19, 1930.

C. B. COTTRELL. 3D

BED AND CYLINDER PRINTING PRESS .Fil'ed June 5, 1928 4 Sheets-Sheet '2 ATTORNEYS 1930. c. B. COTTRELL; so I 1,773,095

. BED AND CYLINDER PRINTING PRESS Filed June 5, 1928 4 Sheets-Sheet 3 Q E W INVENTOR BY WW1 W ATTORNEY-S g- 1930. c. B. COTTRELL, so l',773,095

BED AND CYLINDER PRINTING PRESS Filed June 5, 1928 4 Sheets-Sheet 4 0 O fi -4 N h g INVENTOR %4 %W/y ATTORN EYS Patented Aug. 19, 1930 UNITED STATES PATENT'OFFICEV CALVERT Br COTTRELL, SD, 015 WESTER LY, RHODE ISLAND, ASSIGNOR To C. B. COTTRELL & sons COMPANY, or WESTERLY,

RI-{ODE ISLAND, A oonrone'rron or DELAWARE BED D CYLINDER PRINTING rnEss Application filed June 5,

'bed and cylinder two color printing press in which a single impression cylinder of com paratively small size is caused to retain the sheet thereon for both printings, thereby ensuring perfect register and obviating the ne cessity of transferring the sheet after its first printing'on one impression cylinder to another impression" cylinder for its second printing.

My invention further consists in a printing press of this character in which the sin gle impression cylinder is arranged to make six revolutions during a complete reciprocation of the bed; the impression cylinder making three revolutions in one direction on the forward or printing stroke of the bed and three revolutions in the opposite direction on the return or non-printing stroke of the bed; the sheet being printed twice and then transferred to the delivery mechanism during the three revolutions of the impression cylinder in one direction and then conveyed to and deposited on the delivery table during the three revolutions of the cylinder in the opposite direction. 1

The object of my invention is to not only ensure more perfect printing register but also to materially reduce'the weight and cost of theprinting press and also to bring the feed and delivery mechanisms down into convenient position. for the operator.

A motive fiuidmeans is shown for reciprocating the formbed, such means forming the subject matter of my copending application filedof even date herewith, its serial number being 282,997. r

A practical embodiment of my invention is represented in the accompanying drawings, in Which- Fig. 1 represents the printing press in side elevation with the parts in the positions they assume when the form bed is about to start on its forward or printing stroke, the impression cylinder is about to take a sheet from the feed board and a twice printed sheet is being deposited on to the delivery table by theconveying means of the delivery-mechanism.

Fig. 2 represents :an. enlarged detail suite 1923. Serial No. 282,998.

ling'the feeding and delivery of the sheets,

the parts being in the positions shown in Fig. '1. i v

Fig. 3 represents a detail cross section taken in the planes of the line III-III of Fig. 2,:looking in the direction of the ar- .7 ,c i

i Fig. i represents a detail longitudinal section taken in the plane of the line IVIV of Fig. 3,-looking inthedirection of thearrows with the parts in the positions they assume whenthe leading edge of the twice printed sheet is being transferred from the impression cylinder to the guides of the delivery mechanism.

denoted by 1, the reciprocating form bed "by 2,.the two forms thereon,'by 3 and 4 and .the two form inking mechanisms by 5 and 6. The sheet feed table of any well known orapproved sheet feeding mechanism is de-- noted by 7 and its feedguideby'S. The singleimpression cylinder ,is denoted by 9 and its :sheetgrippers'by 10. "The sheet delivery mechanism may be of any well known or approved form and it is shown herein as comprising adelivery table 11, a reciprocating conveying means 12 and the guides 18, 14 for directing the twice printed sheets from the impression cylinder to the reciprocating conveying means. 3 The motive fluid means for reciprocating the form bed is denoted generally by 15 and will not be specifically described herein as it forms the subject matter of my copending application hereinbefore referred to.

. The impression cylinder 9, thecircumference of which is substantially one-third the stroke of the bed 2 is geared at all times to generally by 11-8.

The several devices for controlling the passage of the sheet to and from the impression cy 'nder will be described generally but not in detail, as they may be 0 any well known or approved construction.

In the present instance the bed is provided on oneiside theredl with a feed guide operating cam 19 arranged in position to engage the enroller 2O onthelower end of the bar fligftfie npper eiid ejftvhich is conneetedto' the rockieve'r 22 which controls the operation of the feed guide 8 to release the sheet as the cylinder is about to startbn its first revolution. a

On the same side of the form bed and adjieeiati tether feed guide operating cam '19 thermisrlocatedithe'cam 23 which is arranged in; 'tiontoengage'a stud or roller 24 carri the lateral sliding pin 25 connected to the'lverl26which ontrols the operation of the tumbler cam pin 27 to bring it into and outiiofi engagement with the gripper tumbler cam 28 for'operating the grippers 10 atthe pmo timedn receilveand grasp the head end sheet fed from the feed table as the cylindemih about to start on its first revolution:v 1 ifl he fom'hed, is als'rprbvided on its op oaite side'with a gripper release cam "29 arranged to engage. a stud or roller 30 carried hyia sod31- connected tonne arm 32 of a rock lelverethe other arm'r 33 of which is provided with a cam 34 arranged in position to en age a stud or roller' 35m an 'arm 36 carried by the impression cylinder gripper shaft; This is so located that the impression 'cylhide! ippers 10will be released as the impressi d cylinder star-heron its third revolu- Tfor permittingithetransier of the head end 0*! 'the shetvto' the? delivery mechanism as the sheet is receiving its second printing.

as: disure thetran'sferbf the head end of thessheotto' the guides 13,141 of thedelivery mechanism I'also pa'o'videthe formbed with astripgling finger operating cam 37 arranged in" 1 'on to engageia stud or roller 38 on a iro tili oolinected to a lever 40 carrying a cam v'ilrarranged' to "be brought into engagement with a stud or roller 42 carried by an arm 43 ei filestripper shaft 44 so as to raise the stripr fingers 45 at the propertime' to direct the eading edge of the sheet between the said 'T1 ,142- 'I w The-form bed is aisoprovided on one side witha'camfi arranged 111 position to en age the stadsor rollere lfir ld to raise the orm tellers of the'inkingmechanism 5 so that they wih notcome in contact? with the form 4. il he-bedis alsow'providd on the other side withimeain'ew arranged [to engage the studs or rollers 5'1 and 52 to raise the form roll ers' ofitheinkingamehanismfi so that they will mes conic Y in "contact witha-th'e form 3. Themechanism for aawmatican eontrollin the operation of the inking mechanisms!) and stroke of the bed and three 6 at the proper times may be of any well known or approved construction.

To ensure the positive feed of the sheet from the impression cylinder to the delivery mechanism I provide coact-ing rollers 53, 54, adjacent the guides 13, 14 and I also provide rollers 55 arranged to be brought into engagement with the sheet while on the impression cylinder, said rollers 55 being carried by one arm 56 of a rock lever, the other arm 570i which is-connected by a rod 58 to one arm 59 of another rock lever, said last named rock lever having an arm 60 carrying a stud or roller 61 arranged to be engaged by a cam 62 carried by a gear 63 which meshes with a gear 64 fast on the impression cylinder shaft 65 exterior to the frame 1. a

It will be seen from the above description that I have provided a bed and cylinder printing press in which the necessity of transferring the sheet between its first and second printings is obviated. I: have also been able to rovide a relatively small impression cyl- India, thereby materially reducing the weight and expense of the press and also bringing the' feed and delivery mechanisms down into a more accessible'position for the operator.

'It is evident that various changes may be resorted to in the construction, form and arrangement of the several parts without departing from the spirit and scope of my in vention, hence I do not intend to be limited to the, particular embodiment hereinshown and described, but a i 1 What'I claim is: 1

1. In a bed and cylinder two color printing press, a reciprocating bed and a single impression cylinder, said cylinder being arranged to make three revolutions in one direction during the printing-stroke of the bed and three revolutions in the oppositedirec- Itoion during the non-printing stroke of the 2. In a bed and cylinder two color printing press, a delivery mechanism, a reciprocating bed and a single impression cylinder, said cylinder being arranged to make three revolutions in one directionduring the printing revolutions in the opposite direction during the non-printing stroke of the bed, the sheet being taken prlnted twice and transferred to the delivery mechanism during the first three revolutions of the cylinder. V

3. In a bed and cylinder two color printing press,a delivery mechanism, a reciprocating bed and a single impression cylinder, said cylinder being arrangedto make three revolutions in'one directionduring the printing stroke of the bed and 'three'revolutions in the opposite direction during the non-printingr stroke of the bed, the sheet being taken, printed twice and transferred to the delivery mechanism during the first three revolutions of the cylinder, and mechanism-operable to cylinder.

release the leading end of the printed sheet at the beginning of the third revolution of the cylinder, to permit its transfer to the delivery mechanism.

4. In a bed and cylinder two color print ing press, a reciprocating bed, a single impression cylinder and a delivery mechanism including a delivery table and means for conveying the printed sheet thereto from the impression cylinder, said cylinder being arranged to make three revolutions in one direction during the printing stroke of the bed and three revolutions in the opposite direction during the non-printing stroke of the bed, the sheet being taken, printed twice and transferred to the printed sheet conveying means of the delivery mechanism during the first three revolutions of the cylinder and conveyed to and deposited on the delivery table during the last three revolutions of the 5. In a bed and cylinder two color printing press, a reciprocating bed, a single impression cylinder and a delivery mechanism including a delivery table and means for cylinder being arranged to makethree revolutions in one direction during the printing stroke of the bed and three revolutions in the opposite direction during the non-printing stroke of the bed, the sheet being taken, printed twice and transferred to the delivery mechanism during the first three revolutions of the cylinder, grippers on the cylinder and cams positioned on the bed for operating the grippers to cause them to receive and grasp the sheet as the cylinder starts its first revolution and to release the sheet as the cylinder finishes its second revolution.

In testimony, that I claim the foregoing as my invention, I have signed my name this first day of June A. D. 1928.

CALVERT B. COTTRELL, 3RD.

conveying the printed sheet thereto from the impression cylinder, said cylinder being arranged to make three revolutions in one direction during the printing stroke of the bed and three revolutions in the opposite direction during the non-printing stroke of the bed, the sheet being taken, printed twice and transferred to the printed sheet conveying means of the delivery mechanism during the first three revolutions of the cylinder and conveyed to and deposited on the delivery table during the last three revolutions of the cylinder, and mechanism operable to release the leading end of the printed sheet at the beginning of the third revolution of the cylinder, to permit its transfer to the printed sheet conveying means of the delivery mechanism while the sheet is still receiving its second printing.

6. In a bed and cylinder two color printing press, a reciprocating bed and a single impression cylinder, the circumference of the impression cylinder being substantially one third the stroke of the bed. i

7. In a bed and cylinder two color printing press, a reciprocating bed and a single impression cylinder, said cylinder being arranged to make three revolutions in one direction during the printing stroke of the bed and three revolutions in the opposite direc tion during the non-printing stroke of the bed, grippers on the cylinder and cams positioned on the bed for operating the grippers to cause them to receive and grasp the sheet as the cylinder starts its first revolution and to release the sheet as the cylinder finishes its second revolution.

8. In a bed and cylinder two color printing press, a delivery mechanism, a reciprocating bed and a single impression cylinder, said loo 

